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The influence of flexible and rigid grazing management and of supplementary feed on output per hectare and per cow

Published online by Cambridge University Press:  02 September 2010

J. D. Leaver
Affiliation:
Wye College, (University of London), Ashford, Kent
R. C. Campling
Affiliation:
Wye College, (University of London), Ashford, Kent
W. Holmes
Affiliation:
Wye College, (University of London), Ashford, Kent
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Summary

1. A comparison was made of the output per hectare and per cow of 3 systems of grazing management each based on a cycle of 5 days grazing followed by a 20-day rest period. The treatments were: C, strip grazing within a paddock, varying the area allotted so that a similar quantity of herbage was available each day, the pasture being frequently trimmed; treatment R, restricted grazing; the cows being allotted a fixed area of the paddock each day (67–5 m2 per cow per day) which was not trimmed or cut after grazing; and treatment RS, as treatment R but with each cow receiving cereal concentrates. Eight cows were on each treatment. Nitrogenous fertilizer was applied at the rate of 86 kg N per ha [1 kg per ha = 0.891b per acre] four weeks before the first grazing and at the same rate after each grazing; a total of 516 kg/ha was applied. The feed intake of each cow was measured on six occasions during the experiment.

2. The experiment continued for 150 days and the mean stocking rate on treatment C was 4–09 cows per ha [1 ha = 2·47 acre] and on the other two treatments 5·92 cows per ha. The number of cow grazing days per hectare were 610, 890 and 890 for treatments C, R and RS respectively and the outputs of milk were C 8450, R 12 420 and RS 13 380 kg/ha. Allowing for the concentrates given the milk outputs were C 7440, R 10 350 and RS 6660 kg/ha.

3. There were only slight differences between the treatments in output per animal.

4. The average intakes per kg W0·73 were similar in treatment C and R but the average intake of cows on treatment C was more uniform over the season. Cows on treatment RS ate consistently more digestible organic matter than those on treatment C and R but the differences became smaller as the season progressed.

Type
Research Article
Copyright
Copyright © British Society of Animal Science 1969

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References

REFERENCES

Anslow, R. 1967. Frequency of cutting and sward production. J. agric. Sci., Camb. 68: 377384.Google Scholar
Curran, M. K., Leaver, J. D. and Weston, E. W. 1967. A note on the use of chromic oxide incorporated in a feed to estimate faecal output in ruminants. Anim. Prod. 9: 561564.Google Scholar
Dent, J. W. and Aldrich, D. T. A. 1963. The inter-relationship between heading date, yield, chemical composition and digestibility in varieties of perennial ryegrass, timothy, cocksfoot and meadow fescue. J. natn. Inst. agric. Bot. 9: 261281.Google Scholar
Greenhalgh, J. F. D. and Runcie, K. V. 1962. The herbage intake and milk production of strip and zero grazed dairy cows. J. agric. Sci., Camb. 59: 95103.Google Scholar
Hancock, J. 1958. The conversion of pasture to milk, the effect of stocking rate and concentrate feeding. J. agric. Sci., Camb. 50: 284296.Google Scholar
Holmes, W. 1962. Grazing management for dairy cattle. J. Br. Grassld. Soc. 17: 3040.Google Scholar
Holmes, W. 1968. The use of nitrogen in the management of pasture for cattle. Herb. Abstr. 38: 265277.Google Scholar
Holmes, W. and Curran, M. K. 1967. Feed intake of grazing cattle. V. A further study of the influence of pasture restriction combined with supplementary feeding on production per animal and per acre. Anim. Prod. 9: 313324.Google Scholar
Holmes, W. and Jones, J. G. W. 1965. The feed intake of milk cows. II. The effect of roughage quality during late pregnancy and lactation. Anim. Prod. 7: 3951.Google Scholar
Holmes, W., Jones, J. G. W. and Adeline, C. 1966. Feed intake of grazing cattle. IV. A study with milk cows of the influence of pasture restriction combined with supplementary feeding on production per animal and per acre. Anim. Prod. 8: 4757.Google Scholar
Holmes, W. and MacLusky, D. S. 1955. The intensive production of herbage for crop drying. VI. A study of the effect of intensive fertilizer treatment on species and strains of grass grown alone and with white clover. J. agric. Sci., Camb. 46: 267286.Google Scholar
Jones, J. G. W., Holmes, W. and Drake-Brockman, R. M. 1965. The feed intake of grazing cattle. III. The influence of level of milk yield. Anim. Prod. 7: 141151.Google Scholar
Leaver, J. D., Campling, R. C. and Holmes, W. 1968. The use of supplementary feeds for grazing dairy cows. Dairy Sci. Abstr. 30: 355361.Google Scholar
Ministry of Agriculture, Fisheries and Food 1967. Costs and efficiency in milk production 1965/66. H.M.S.O. London.Google Scholar
McMeekan, C. P. 1958. The effect of stocking rate and concentrate feeding on the conversion of pasture to milk. Proc. N.Z. Soc. Anim. Prod. 18: 3442.Google Scholar
McMeekan, C. P. and Walshe, M. J. 1963. The inter-relationships of grazing method and stocking rate on the efficiency of pasture utilization by dairy cattle. J. agric. Sci., Camb. 61: 157166.Google Scholar